(Methyl) Acrylic compound, polyurethane (methyl) acrylic ester, and synthetic method

Abstract

The invention discloses polyurethane (methyl) acrylic ester which comprises an ethylene unsaturated group, hydroxide radical, and polyvalent saturated hydrocarbon. The weight ratio of the polyvalent saturated hydrocarbon is greater than 70%, and the average degree of functionality of the ethylene unsaturated group is from 0.5 to 1.5. The average degree of functionality of the hydroxide radical is from 0.5 to 1.5, and the number-average molecular weight of the polyurethane (methyl) acrylic ester is less than 20000 and greater than 3500.

Description

technical field

[0001] The present invention relates to a (meth)acrylate, and in particular to a (meth)acrylate compound / oligomer with at least one end being a hydroxyl group and at least one end being an ethylenically unsaturated group. Background technique

[0002] Liquid crystal display devices have the advantages of light weight, power saving, no radiation and full-color display, and have become the most common display products at present.

[0003] With the development of display panel and touch technology, the requirements for adhesives necessary for fixing various parts in the display device are also getting higher and higher. For example, if an adhesive is to be used in the display area of ​​a display device, certain optical criteria must be met. In addition, stress will be introduced at the place where the adhesive is pasted, which may also affect the performance of the display device. Therefore, further research and improvement of current adhesives is necessary. ...

Examples

experiment example 1

[0098] Experimental Example 1: Oligomer C

[0099] The synthesis method of oligomer C can be divided into two stages, the first stage is roughly the same as that of Comparative Example 1, the difference is that when IEA is added, the equivalent ratio of isocyanate group / hydroxyl group is controlled to about 0.25. Afterwards, after confirming that the isocyanate group content in the mixture in the four-necked bottle is less than 0.5% by weight, the temperature is raised to 60° C. and IPDI is continued to be added dropwise to react with the hydroxyl group of about 50% molar equivalent (the 50% equivalent here is Polytail Based on all hydroxyl groups, including those that have reacted with IEA). After three hours of reaction, the end point of the reaction was determined by measuring the residual isocyanate group content.

technical field

[0001] The present invention relates to a (meth)acrylate, and in particular to a (meth)acrylate compound / oligomer with at least one end being a hydroxyl group and at least one end being an ethylenically unsaturated group. Background technique

[0002] Liquid crystal display devices have the advantages of light weight, power saving, no radiation and full-color display, and have become the most common display products at present.

[0003] With the development of display panel and touch technology, the requirements for adhesives necessary for fixing various parts in the display device are also getting higher and higher. For example, if an adhesive is to be used in the display area of ​​a display device, certain optical criteria must be met. In addition, stress will be introduced at the place where the adhesive is pasted, which may also affect the performance of the display device. Therefore, further research and improvement of current adhesives is necessary. ...

Examples

experiment example 1

[0098] Experimental Example 1: Oligomer C

[0099] The synthesis method of oligomer C can be divided into two stages, the first stage is roughly the same as that of Comparative Example 1, the difference is that when IEA is added, the equivalent ratio of isocyanate group / hydroxyl group is controlled to about 0.25. Afterwards, after confirming that the isocyanate group content in the mixture in the four-necked bottle is less than 0.5% by weight, the temperature is raised to 60° C. and IPDI is continued to be added dropwise to react with the hydroxyl group of about 50% molar equivalent (the 50% equivalent here is Polytail Based on all hydroxyl groups, including those that have reacted with IEA). After three hours of reaction, the end point of the reaction was determined by measuring the residual isocyanate group content.

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